Acne and hyperpigmentation after Co2 fractional laser.

i have been off full long course of accutane 10 months ago left me with tens of scars according to sever initial break out,six months later i started my first session of fractional laser, i have done three sessions one every month, first two i had no side effects,after 3rd session my skin started to break out and my skin is darker and my doctor put me on hydroquinone cream i still have two more sessions and i'm afraid that would return my acne back and darken my skin.. is that possible?